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l } SSPC-SP 5 March 1, 1985 abrasive recovery. as agreed upon by the party responsible for establishing 6.2.3 Dry abrasive blasting, using a closed cycle, the requirements and the party responsible for performing recirculating abrasive system with centrifugal wheels and the work. abrasive. 8.2 Conditions not complying with this specification 6.3 Other methods of surface preparation (such as shall be corrected. In case of dispute the arbitration or wet abrasive blasting) may be used to achieve a White settlement procedure established in the procurement Metal Blast Cleaned surface by mutual agreement be- documents (project specification) shall be followed. If no tween the party responsible for performing the work and arbitration or settlement procedure is established, then the party responsible for establishing the requirements or the procedure established by the American Arbitration his representative. Association shall be used. 'NOTE: If wet abrasive blasting is used, information on the 8.3 The procurement documents (project specifica- use of inhibitors to prevent the formation of rust im- tion) should establish the responsibility for inspection and mediately after wet blast cleaning is contained in Section for any required affidavit certifying compliance with the A.9 of the Appendix. specification. 7. Procedures Following Blast Cleaning and 9. Safety and Environmental Requirements Immediately Prior to Painting 9.1 Blast cleaning is a hazardous operation. 7.1 Visible deposits of'oil, grease, or other con- Therefore, all work shall be conducted in such a manner to taminants shall be removed by any of the methods comply with all applicable insurance underwriter, local• specified in SSPC-SP 1 or other methods agreed upon by state, and federal safety and environmental rules and the party responsible for establishing the requirements requirements. and the party responsible for performing the work. *NOTE: SSPC-PA Guide 3, "A Guide to Safety in Paint 7.2 Dust and loose residues shall be removed from Application," addresses safety concerns for coating work. prepared surfaces by brushing, blowing off with clean, dry air,vacuum cleaning or other methods agreed upon by the 1U. comments party responsible for establishing the requirements and 10.1 While every precaution is taken to insure that all the party responsible for performing the work. Moisture information furnished in SSPC specifications is as ac- separators, oil separators, traps, or other equipment may curate, complete, and useful as possible, the Steel Struc- be necessary to achieve clean, dry air. tures Painting Council cannot assume responsibility nor 7.3 After blast cleaning, surface imperfections which incur any obligation resulting from the use of any mate- remain (i.e., sharp fins, sharp edges, weld spatter, burning rials, paints, or methods specified therein, or of the slag, scabs, slivers, etc.)shall be removed to the extent re- specification itself. quired in the procurement documents (project specifica- 10,2 Additional information and data relative to this tion). Any damage to the surface profile resulting from the, specification are contained in the following brief Appen- removal of surface imperfections shall be corrected to dix. More detailed information and data are presented in a meet the requirements of section 2.3. separate document, SSPC-SP COM, "Surface Preparation 'NOTE:Additional information on surface imperfections is Commentary." The recommendations contained in the contained in Section A.5 of the Appendix. Notes, Appendix, and SSPC-SP COM are believed to repre- 7.4 Any visible rust that forms on the surface of the sent good practice, but are not to be considered as re- steel after blast cleaning shall be removed by reblasting quirements of the specification. The table below lists the the rusted areas to meet the requirements of this subjects discussed relevant to White Metal Blast Cleaning specification before painting. and appropriate section of SSPC-SP COM. `NOTE: Information on rust-back (rerusting) and surface Subject Commentary Section condensation is contained in Sections A.7 and A.8 of the Abrasive Selection . . . . . . . . . . . . . . 5. Appendix, Degree of Cleaning. . . . . . . .. . . . . . 11.5 Film Thickness . . .. . . . .. . . . . . . . . 10. 8. Inspection Wet Abrasive Blast Cleaning. . . . . . 9. 8.1 Work and materials supplied under this specifica- Maintenance Painting . .. . . .. . . . . 3.2 tion are subject to inspection by the party responsible for Bust Back(Rerusting) . . . . .. .. . . . 8. establishing the requirements or his representative. Surface Profile . . . . . . . . . .. . .. . . . 6. Materials and work areas shall be accessible to the in. Visual Standards .. . . .. . . . . .. . . . 7. speclr. The procedures and times of inspection shall be Weld Spatter. . . . .. . . ... . .. ... . . 4.1 , 40